Vertical arrangement in layers of rock units whose sequence is used to study the geological history of the strata.
Alaska mineral resources [ More info] Reports, data, and current research on mineral resources in Alaska
Aquifer basics [ More info] Links to general information on water supply by aquifers based on rock types and to principal national aquifers by name.
BRASS: Bedrock Regional Aquifer Systematics Study [ More info] Description of the project to publish new bedrock geologic maps in the United States to advance the understanding of the region's bedrock aquifers. Includes list of projects.
Bedform sedimentology [ More info] Bedform sedimentology home page with links to information on sedimentary structures including, explanatory text, computer-generated images and movies, photographs, and bedform simulation software.
Bedrock geologic map of Vermont [ More info] At a scale of 1:100,000, this map shows an uncommon level of detail for State geologic maps. Mapped rock units are primarily based on lithology, or rock type, to facilitate derivative studies in multiple disciplines.
Carolina slate belt gold deposits in Virginia, North Carolina, South Carolina, and Georgia [ More info] Report of research on the Carolina slate belt and gold deposits in Virginia, North Carolina, South Carolina, and Georgia with geologic mapping, mineralogic, geochemical, and fluid evolution studies, radiogenic dating, and stable isotope studies.
Cross-bedding, bedforms,and paleocurrents [ More info] The on-line version of Cross-Bedding, Bedforms, and Paleocurrents, with computer images, photographic images, and text.
Fossil locations and data for the Taylor Mountains, and parts of the Bethel, Goodnews, and Dillingham quadrangles, southwestern Alaska [ More info] Location, taxa present, and geological context for 290 fossil samples collected in this area.
Generalized geologic map of the Yosemite National Park area [ More info] Surficial geologic map of the Yosemite National Park area with links to the legend and text.
Generalized surficial geologic map of the Pueblo 1 degree x 2 degree quadrangle, Colorado. [ More info] Surficial geologic map of the Pueblo quadrangle in Colorado with text and references in PDF format, metadata, and GIS files to download.
Alphabetical Index of Topics
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